# 计科1915班 0306224505 屠玉宝

def show():
    print("-" * 20)


if __name__ == '__main__':
    try:
        num = int(input("请输入一个数字: "))
        if num < 0:
            print("请输入一个正整数")
            exit()
    except Exception as e:
        print("请输入一个正整数")
        exit()

    for i in range(num):
        show()
